Vilter VSM 71-701, Operation And Service Manual

Page: 216 / 244

PRESSURE RELIEF VALVE
INSTRUCTIONS
VALVE - LIST OF PARTS
1. Valve Cap 6. Valve Body
2. Adjusting Screw 7. Valve Spring
3. Lock Nut 8. Poppet
4. Spring Guide 9. Cap Gasket
5. Bonnet 10. Bonnet
DISASSEMBLY
Mark valve and head before disassembly to insure proper
reassembly.
1. Remove valve cap.
2. Measure and record length of extension of adjusting
screw. Refer to “A” on Figures 13 and 14.
3. Loosen locknut and back out adjusting screw until
spring pressure is released.
4. Remove bonnet, spring guide, spring and poppet from
valve body. Clean and inspect all parts for wear or
damage and replace as necessary.
ASSEMBLY
Reverse procedures outlined under Disassembly. If valve
is removed for repairs, be sure to replace in same
position. Relief valve adjusting screw cap must
always
point towards suction side of pump. If pump rotation is
reversed, remove relief valve and turn end for end. Refer
to Figures 5, page 2.
FIGURE 14
VALVE – AS, AK and AL SIZES
VALVE - LIST OF PARTS
1. Valve Cap 6. Valve Body
2. Adjusting Screw 7. Valve Spring
3. Lock Nut 8. Poppet
4. Spring Guide 9. Cap Gasket
5. Bonnet
FIGURE 13
VALVE - GG, HJ, and HL SIZES
DANGER
BEFORE OPENING ANY VIKING PUMP LIQUID
CHAMBER (PUMPING CHAMBER,
RESERVOIR, RELIEF VALVE ADJUSTING CAP
FITTING ETC.) BE SURE:
1. THAT ANY PRESSURE IN CHAMBER
HAS BEEN COMPLETELY VENTED
THROUGH SUCTION OR DISCHARGE
LINES OR OTHER APPROPRIATE
OPENINGS OR CONNECTIONS.
2. THAT THE DRIVING MEANS (MOTOR,
TURBINE, ENGINE, ETC.) HAS BEEN
“LOCKED OUT” OR MADE NON-
OPERATIONAL SO THAT IT CANNOT BE
STARTED WHILE WORK IS BEING DONE
ON PUMP.
3. THAT YOU KNOW WHAT LIQUID THE
PUMP HAS BEEN HANDLING AND THE
PRECAUTIONS NECESSARY TO SAFELY
HANDLE THE LIQUID. OBTAIN A
MATERIAL SAFETY DATA SHEET
(MSDS) FOR THE LIQUID TO BE SURE
THESE PRECAUTIONS ARE
UNDERSTOOD.
FAILURE TO FOLLOW ABOVE LISTED
PRECAUTIONARY MEASURES MAY RESULT
IN SERIOUS INJURY OR DEATH.
SECTION TSM 144 ISSUE B
PAGE 8 OF 9